What does “check engine” light usually mean?
What does "check engine" light usually mean? The check engine light is a signal that the onboard diagnostics system (or OBD II) has detected a malfunction in the vehicle's emissions, ignition, fuel or exhaust systems. How do you check the Check Engine light? Put your key in the ignition and switch the vehicle to “on.” Do not start the vehicle. Once the lights on the dash come on, turn off all the vehicle’s accessories, like the radio. Then, press the “read” button on the scanner to access the check engine light code. What causes the Check Engine light to come...